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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2012 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: PersistentObjectTransactionManager.html 947 2014-11-12 22:14:09Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.pobj;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.HashMap;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>import javax.transaction.xa.XAResource;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import javax.transaction.xa.Xid;<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span>import org.springframework.beans.factory.BeanNameAware;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import org.springframework.beans.factory.InitializingBean;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import org.springframework.dao.DataIntegrityViolationException;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import org.springframework.dao.OptimisticLockingFailureException;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import org.springframework.transaction.CannotCreateTransactionException;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import org.springframework.transaction.NoTransactionException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.springframework.transaction.TransactionDefinition;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.springframework.transaction.TransactionSystemException;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.springframework.transaction.TransactionUsageException;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.springframework.transaction.support.AbstractPlatformTransactionManager;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.springframework.transaction.support.DefaultTransactionStatus;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.springframework.transaction.support.ResourceTransactionManager;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>/**<a name="line.29"></a>
<span class="sourceLineNo">030</span> * {@link PersistentObject} implementation of Spring's<a name="line.30"></a>
<span class="sourceLineNo">031</span> * {@link org.springframework.transaction.PlatformTransactionManager PlatformTransactionManager} interface,<a name="line.31"></a>
<span class="sourceLineNo">032</span> * allowing methods annotated with Spring's {@link org.springframework.transaction.annotation.Transactional &amp;#64;Transactional}<a name="line.32"></a>
<span class="sourceLineNo">033</span> * annotation to perform transactions on {@link PersistentObject}s.<a name="line.33"></a>
<span class="sourceLineNo">034</span> *<a name="line.34"></a>
<span class="sourceLineNo">035</span> * &lt;p&gt;<a name="line.35"></a>
<span class="sourceLineNo">036</span> * During a transaction, the transaction's root object is available via the method {@link #getRoot}, and may be replaced entirely<a name="line.36"></a>
<span class="sourceLineNo">037</span> * via {@link #setRoot setRoot()}. When the transaction completes, the transaction's root object will be automatically<a name="line.37"></a>
<span class="sourceLineNo">038</span> * written back to the {@link PersistentObject} via {@link PersistentObject#setRoot(Object, long) PersistentObject.setRoot()}<a name="line.38"></a>
<span class="sourceLineNo">039</span> * (unless the transaction was read-only). During commit, the {@link PersistentObject} version number is verified, and<a name="line.39"></a>
<span class="sourceLineNo">040</span> * if another update has occurred since the transaction was opened, a {@link PersistentObjectVersionException} is thrown<a name="line.40"></a>
<span class="sourceLineNo">041</span> * (consider using {@link org.dellroad.stuff.spring.RetryTransaction &amp;#64;RetryTransaction} for automatic retry in this case).<a name="line.41"></a>
<span class="sourceLineNo">042</span> * &lt;/p&gt;<a name="line.42"></a>
<span class="sourceLineNo">043</span> *<a name="line.43"></a>
<span class="sourceLineNo">044</span> * &lt;p&gt;<a name="line.44"></a>
<span class="sourceLineNo">045</span> * Transactions are associated with threads; the {@link PersistentObjectTransactionManager} associated with the current thread's<a name="line.45"></a>
<span class="sourceLineNo">046</span> * transaction is available via {@link #getCurrent()} (or {@link #getCurrent(String)} if there is more than one).<a name="line.46"></a>
<span class="sourceLineNo">047</span> * &lt;/p&gt;<a name="line.47"></a>
<span class="sourceLineNo">048</span> *<a name="line.48"></a>
<span class="sourceLineNo">049</span> * &lt;p&gt;<a name="line.49"></a>
<span class="sourceLineNo">050</span> * The {@code persistentObject} property is required. The {@code readOnlySharedRoot} property is optional and configures whether,<a name="line.50"></a>
<span class="sourceLineNo">051</span> * during read-only transactions only, {@link #getRoot} returns the {@linkplain PersistentObject#getSharedRoot shared root} object.<a name="line.51"></a>
<span class="sourceLineNo">052</span> * In this mode, root object graph copies are avoided entirely for read-only transactions, but the application code must be<a name="line.52"></a>
<span class="sourceLineNo">053</span> * careful to not modify the object graph returned by {@link #getRoot} at any time, either during or after the transaction.<a name="line.53"></a>
<span class="sourceLineNo">054</span> * &lt;/p&gt;<a name="line.54"></a>
<span class="sourceLineNo">055</span> *<a name="line.55"></a>
<span class="sourceLineNo">056</span> * &lt;p&gt;<a name="line.56"></a>
<span class="sourceLineNo">057</span> * This class also provides an {@link XAResource} for use with JTA/XA tranasactions. Once elisted in a JTA transaction,<a name="line.57"></a>
<span class="sourceLineNo">058</span> * the usage described above using {@link #getRoot} and {@link #setRoot setRoot()} is identical.<a name="line.58"></a>
<span class="sourceLineNo">059</span> * &lt;/p&gt;<a name="line.59"></a>
<span class="sourceLineNo">060</span> *<a name="line.60"></a>
<span class="sourceLineNo">061</span> * @param &lt;T&gt; type of the root object<a name="line.61"></a>
<span class="sourceLineNo">062</span> * @see PersistentObject<a name="line.62"></a>
<span class="sourceLineNo">063</span> * @see PersistentObject#getSharedRoot<a name="line.63"></a>
<span class="sourceLineNo">064</span> */<a name="line.64"></a>
<span class="sourceLineNo">065</span>@SuppressWarnings("serial")<a name="line.65"></a>
<span class="sourceLineNo">066</span>public class PersistentObjectTransactionManager&lt;T&gt; extends AbstractPlatformTransactionManager<a name="line.66"></a>
<span class="sourceLineNo">067</span>  implements BeanNameAware, ResourceTransactionManager, InitializingBean {<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span>    private static final ThreadLocal&lt;HashMap&lt;String, PersistentObjectTransactionManager&lt;?&gt;&gt;&gt; MANAGER_MAP = new ThreadLocal&lt;&gt;();<a name="line.69"></a>
<span class="sourceLineNo">070</span><a name="line.70"></a>
<span class="sourceLineNo">071</span>    /**<a name="line.71"></a>
<span class="sourceLineNo">072</span>     * The configured {@link PersistentObject} from which transactions are created.<a name="line.72"></a>
<span class="sourceLineNo">073</span>     */<a name="line.73"></a>
<span class="sourceLineNo">074</span>    protected transient PersistentObject&lt;T&gt; persistentObject;<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>    final ConcurrentHashMap&lt;Xid, TxInfo&lt;T&gt;&gt; xaMap = new ConcurrentHashMap&lt;&gt;();<a name="line.76"></a>
<span class="sourceLineNo">077</span><a name="line.77"></a>
<span class="sourceLineNo">078</span>    private final ThreadLocal&lt;TxInfo&lt;T&gt;&gt; currentInfo = new ThreadLocal&lt;&gt;();<a name="line.78"></a>
<span class="sourceLineNo">079</span><a name="line.79"></a>
<span class="sourceLineNo">080</span>    private String beanName;<a name="line.80"></a>
<span class="sourceLineNo">081</span>    private boolean readOnlySharedRoot;<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span>// BeanNameAware<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>    /**<a name="line.85"></a>
<span class="sourceLineNo">086</span>     * Get this instance's assigned bean name.<a name="line.86"></a>
<span class="sourceLineNo">087</span>     */<a name="line.87"></a>
<span class="sourceLineNo">088</span>    public String getBeanName() {<a name="line.88"></a>
<span class="sourceLineNo">089</span>        return this.beanName;<a name="line.89"></a>
<span class="sourceLineNo">090</span>    }<a name="line.90"></a>
<span class="sourceLineNo">091</span><a name="line.91"></a>
<span class="sourceLineNo">092</span>    @Override<a name="line.92"></a>
<span class="sourceLineNo">093</span>    public void setBeanName(String beanName) {<a name="line.93"></a>
<span class="sourceLineNo">094</span>        this.beanName = beanName;<a name="line.94"></a>
<span class="sourceLineNo">095</span>    }<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span>// InitializingBean<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span>    @Override<a name="line.99"></a>
<span class="sourceLineNo">100</span>    public void afterPropertiesSet() throws Exception {<a name="line.100"></a>
<span class="sourceLineNo">101</span>        if (this.persistentObject == null)<a name="line.101"></a>
<span class="sourceLineNo">102</span>            throw new Exception("no PersistentObject configured");<a name="line.102"></a>
<span class="sourceLineNo">103</span>        if (this.beanName == null)<a name="line.103"></a>
<span class="sourceLineNo">104</span>            throw new Exception("no bean name configured");<a name="line.104"></a>
<span class="sourceLineNo">105</span>    }<a name="line.105"></a>
<span class="sourceLineNo">106</span><a name="line.106"></a>
<span class="sourceLineNo">107</span>// Properties<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span>    /**<a name="line.109"></a>
<span class="sourceLineNo">110</span>     * Get the {@link PersistentObject} that this instance will operate on.<a name="line.110"></a>
<span class="sourceLineNo">111</span>     */<a name="line.111"></a>
<span class="sourceLineNo">112</span>    public PersistentObject&lt;T&gt; getPersistentObject() {<a name="line.112"></a>
<span class="sourceLineNo">113</span>        return this.persistentObject;<a name="line.113"></a>
<span class="sourceLineNo">114</span>    }<a name="line.114"></a>
<span class="sourceLineNo">115</span><a name="line.115"></a>
<span class="sourceLineNo">116</span>    /**<a name="line.116"></a>
<span class="sourceLineNo">117</span>     * Configure the {@link PersistentObject} that this instance will operate on.<a name="line.117"></a>
<span class="sourceLineNo">118</span>     *<a name="line.118"></a>
<span class="sourceLineNo">119</span>     * &lt;p&gt;<a name="line.119"></a>
<span class="sourceLineNo">120</span>     * Required property.<a name="line.120"></a>
<span class="sourceLineNo">121</span>     * &lt;/p&gt;<a name="line.121"></a>
<span class="sourceLineNo">122</span>     */<a name="line.122"></a>
<span class="sourceLineNo">123</span>    public void setPersistentObject(PersistentObject&lt;T&gt; persistentObject) {<a name="line.123"></a>
<span class="sourceLineNo">124</span>        this.persistentObject = persistentObject;<a name="line.124"></a>
<span class="sourceLineNo">125</span>    }<a name="line.125"></a>
<span class="sourceLineNo">126</span><a name="line.126"></a>
<span class="sourceLineNo">127</span>    /**<a name="line.127"></a>
<span class="sourceLineNo">128</span>     * Get whether, during read-only transactions, {@link #getRoot} returns a new copy of the<a name="line.128"></a>
<span class="sourceLineNo">129</span>     * {@link PersistentObject} object graph or the {@linkplain PersistentObject#getSharedRoot shared root}.<a name="line.129"></a>
<span class="sourceLineNo">130</span>     */<a name="line.130"></a>
<span class="sourceLineNo">131</span>    public boolean isReadOnlySharedRoot() {<a name="line.131"></a>
<span class="sourceLineNo">132</span>        return this.readOnlySharedRoot;<a name="line.132"></a>
<span class="sourceLineNo">133</span>    }<a name="line.133"></a>
<span class="sourceLineNo">134</span><a name="line.134"></a>
<span class="sourceLineNo">135</span>    /**<a name="line.135"></a>
<span class="sourceLineNo">136</span>     * Configure whether, during read-only transactions, {@link #getRoot} returns a new copy of the<a name="line.136"></a>
<span class="sourceLineNo">137</span>     * {@link PersistentObject} object graph or the {@linkplain PersistentObject#getSharedRoot shared root}.<a name="line.137"></a>
<span class="sourceLineNo">138</span>     *<a name="line.138"></a>
<span class="sourceLineNo">139</span>     * &lt;p&gt;<a name="line.139"></a>
<span class="sourceLineNo">140</span>     * Default value is false.<a name="line.140"></a>
<span class="sourceLineNo">141</span>     * &lt;/p&gt;<a name="line.141"></a>
<span class="sourceLineNo">142</span>     */<a name="line.142"></a>
<span class="sourceLineNo">143</span>    public void setReadOnlySharedRoot(boolean readOnlySharedRoot) {<a name="line.143"></a>
<span class="sourceLineNo">144</span>        this.readOnlySharedRoot = readOnlySharedRoot;<a name="line.144"></a>
<span class="sourceLineNo">145</span>    }<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span>    /**<a name="line.147"></a>
<span class="sourceLineNo">148</span>     * Get the {@link XAResource} corresponding to this instance.<a name="line.148"></a>
<span class="sourceLineNo">149</span>     */<a name="line.149"></a>
<span class="sourceLineNo">150</span>    public XAResource getXAResource() {<a name="line.150"></a>
<span class="sourceLineNo">151</span>        return new PersistentObjectXAResource&lt;T&gt;(this);<a name="line.151"></a>
<span class="sourceLineNo">152</span>    }<a name="line.152"></a>
<span class="sourceLineNo">153</span><a name="line.153"></a>
<span class="sourceLineNo">154</span>// Current Instance<a name="line.154"></a>
<span class="sourceLineNo">155</span><a name="line.155"></a>
<span class="sourceLineNo">156</span>    /**<a name="line.156"></a>
<span class="sourceLineNo">157</span>     * Get the instance associated with an open transaction in the current thread and having the given bean name.<a name="line.157"></a>
<span class="sourceLineNo">158</span>     *<a name="line.158"></a>
<span class="sourceLineNo">159</span>     * @param beanName bean name assigned to the desired instance<a name="line.159"></a>
<span class="sourceLineNo">160</span>     * @throws IllegalArgumentException if {@code name} is null<a name="line.160"></a>
<span class="sourceLineNo">161</span>     * @throws IllegalStateException if the current thread is not running within a transaction managed by<a name="line.161"></a>
<span class="sourceLineNo">162</span>     *  a {@link PersistentObjectTransactionManager} assigned the given name<a name="line.162"></a>
<span class="sourceLineNo">163</span>     */<a name="line.163"></a>
<span class="sourceLineNo">164</span>    @SuppressWarnings("unchecked")<a name="line.164"></a>
<span class="sourceLineNo">165</span>    public static &lt;T&gt; PersistentObjectTransactionManager&lt;T&gt; getCurrent(String beanName) {<a name="line.165"></a>
<span class="sourceLineNo">166</span>        if (beanName == null)<a name="line.166"></a>
<span class="sourceLineNo">167</span>            throw new IllegalArgumentException("null beanName");<a name="line.167"></a>
<span class="sourceLineNo">168</span>        final HashMap&lt;String, PersistentObjectTransactionManager&lt;?&gt;&gt; managerMap<a name="line.168"></a>
<span class="sourceLineNo">169</span>          = PersistentObjectTransactionManager.getManagerMap(false);<a name="line.169"></a>
<span class="sourceLineNo">170</span>        final PersistentObjectTransactionManager&lt;?&gt; manager = managerMap != null ? managerMap.get(beanName) : null;<a name="line.170"></a>
<span class="sourceLineNo">171</span>        if (manager == null) {<a name="line.171"></a>
<span class="sourceLineNo">172</span>            throw new IllegalStateException("no PersistentObjectTransactionManager named `" + beanName<a name="line.172"></a>
<span class="sourceLineNo">173</span>              + "' has an open transaction in the current thread");<a name="line.173"></a>
<span class="sourceLineNo">174</span>        }<a name="line.174"></a>
<span class="sourceLineNo">175</span>        if (manager.logger.isTraceEnabled())<a name="line.175"></a>
<span class="sourceLineNo">176</span>            manager.logger.trace("PersistentObjectTransactionManager.getCurrent(\"" + beanName + "\"): returning " + manager);<a name="line.176"></a>
<span class="sourceLineNo">177</span>        return (PersistentObjectTransactionManager&lt;T&gt;)manager;<a name="line.177"></a>
<span class="sourceLineNo">178</span>    }<a name="line.178"></a>
<span class="sourceLineNo">179</span><a name="line.179"></a>
<span class="sourceLineNo">180</span>    /**<a name="line.180"></a>
<span class="sourceLineNo">181</span>     * Get the (unique) instance associated with an open transaction in the current thread.<a name="line.181"></a>
<span class="sourceLineNo">182</span>     *<a name="line.182"></a>
<span class="sourceLineNo">183</span>     * &lt;p&gt;<a name="line.183"></a>
<span class="sourceLineNo">184</span>     * This is a convenience method for the common case where there is only one instance associated with the current thread.<a name="line.184"></a>
<span class="sourceLineNo">185</span>     * &lt;/p&gt;<a name="line.185"></a>
<span class="sourceLineNo">186</span>     *<a name="line.186"></a>
<span class="sourceLineNo">187</span>     * @throws IllegalStateException if the current thread is not running within a<a name="line.187"></a>
<span class="sourceLineNo">188</span>     *  {@link PersistentObjectTransactionManager} transaction<a name="line.188"></a>
<span class="sourceLineNo">189</span>     * @throws IllegalStateException there is more than one {@link PersistentObjectTransactionManager} transaction<a name="line.189"></a>
<span class="sourceLineNo">190</span>     *  open in the current thread<a name="line.190"></a>
<span class="sourceLineNo">191</span>     */<a name="line.191"></a>
<span class="sourceLineNo">192</span>    @SuppressWarnings("unchecked")<a name="line.192"></a>
<span class="sourceLineNo">193</span>    public static &lt;T&gt; PersistentObjectTransactionManager&lt;T&gt; getCurrent() {<a name="line.193"></a>
<span class="sourceLineNo">194</span>        final HashMap&lt;String, PersistentObjectTransactionManager&lt;?&gt;&gt; managerMap<a name="line.194"></a>
<span class="sourceLineNo">195</span>          = PersistentObjectTransactionManager.getManagerMap(false);<a name="line.195"></a>
<span class="sourceLineNo">196</span>        if (managerMap == null || managerMap.isEmpty()) {<a name="line.196"></a>
<span class="sourceLineNo">197</span>            throw new IllegalStateException("there are no PersistentObjectTransactionManager transactions open"<a name="line.197"></a>
<span class="sourceLineNo">198</span>              + " in the current thread");<a name="line.198"></a>
<span class="sourceLineNo">199</span>        }<a name="line.199"></a>
<span class="sourceLineNo">200</span>        if (managerMap.size() &gt; 1) {<a name="line.200"></a>
<span class="sourceLineNo">201</span>            throw new IllegalStateException("there are multiple PersistentObjectTransactionManager transactions open"<a name="line.201"></a>
<span class="sourceLineNo">202</span>              + " in the current thread: " + managerMap.keySet() + "; invoke getCurrent() with explicitly specified bean name");<a name="line.202"></a>
<span class="sourceLineNo">203</span>        }<a name="line.203"></a>
<span class="sourceLineNo">204</span>        final PersistentObjectTransactionManager&lt;T&gt; manager<a name="line.204"></a>
<span class="sourceLineNo">205</span>          = (PersistentObjectTransactionManager&lt;T&gt;)managerMap.values().iterator().next();<a name="line.205"></a>
<span class="sourceLineNo">206</span>        if (manager.logger.isTraceEnabled())<a name="line.206"></a>
<span class="sourceLineNo">207</span>            manager.logger.trace("PersistentObjectTransactionManager.getCurrent(): returning " + manager);<a name="line.207"></a>
<span class="sourceLineNo">208</span>        return manager;<a name="line.208"></a>
<span class="sourceLineNo">209</span>    }<a name="line.209"></a>
<span class="sourceLineNo">210</span><a name="line.210"></a>
<span class="sourceLineNo">211</span>    private static HashMap&lt;String, PersistentObjectTransactionManager&lt;?&gt;&gt; getManagerMap(boolean create) {<a name="line.211"></a>
<span class="sourceLineNo">212</span>        HashMap&lt;String, PersistentObjectTransactionManager&lt;?&gt;&gt; managerMap = MANAGER_MAP.get();<a name="line.212"></a>
<span class="sourceLineNo">213</span>        if (managerMap == null &amp;&amp; create) {<a name="line.213"></a>
<span class="sourceLineNo">214</span>            managerMap = new HashMap&lt;String, PersistentObjectTransactionManager&lt;?&gt;&gt;();<a name="line.214"></a>
<span class="sourceLineNo">215</span>            MANAGER_MAP.set(managerMap);<a name="line.215"></a>
<span class="sourceLineNo">216</span>        }<a name="line.216"></a>
<span class="sourceLineNo">217</span>        return managerMap;<a name="line.217"></a>
<span class="sourceLineNo">218</span>    }<a name="line.218"></a>
<span class="sourceLineNo">219</span><a name="line.219"></a>
<span class="sourceLineNo">220</span>// Root Object Access<a name="line.220"></a>
<span class="sourceLineNo">221</span><a name="line.221"></a>
<span class="sourceLineNo">222</span>    /**<a name="line.222"></a>
<span class="sourceLineNo">223</span>     * Determine whether the transaction associated with the current thread is a read-only transaction.<a name="line.223"></a>
<span class="sourceLineNo">224</span>     *<a name="line.224"></a>
<span class="sourceLineNo">225</span>     * @return true if the transaction associated with the current thread is a read-only transaction<a name="line.225"></a>
<span class="sourceLineNo">226</span>     * @throws IllegalStateException if there is no transaction associated with the current thread<a name="line.226"></a>
<span class="sourceLineNo">227</span>     */<a name="line.227"></a>
<span class="sourceLineNo">228</span>    public boolean isReadOnly() {<a name="line.228"></a>
<span class="sourceLineNo">229</span>        final TxInfo&lt;T&gt; info = this.currentInfo.get();<a name="line.229"></a>
<span class="sourceLineNo">230</span>        if (info == null)<a name="line.230"></a>
<span class="sourceLineNo">231</span>            throw new IllegalStateException("there is no transaction associated with the current thread");<a name="line.231"></a>
<span class="sourceLineNo">232</span>        return info.isReadOnly();<a name="line.232"></a>
<span class="sourceLineNo">233</span>    }<a name="line.233"></a>
<span class="sourceLineNo">234</span><a name="line.234"></a>
<span class="sourceLineNo">235</span>    /**<a name="line.235"></a>
<span class="sourceLineNo">236</span>     * Get the snapshot version of the transaction associated with the current thread.<a name="line.236"></a>
<span class="sourceLineNo">237</span>     *<a name="line.237"></a>
<span class="sourceLineNo">238</span>     * @return snapshot version of the transaction associated with the current thread.<a name="line.238"></a>
<span class="sourceLineNo">239</span>     * @throws IllegalStateException if there is no transaction associated with the current thread<a name="line.239"></a>
<span class="sourceLineNo">240</span>     */<a name="line.240"></a>
<span class="sourceLineNo">241</span>    public long getSnapshotVersion() {<a name="line.241"></a>
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<span class="sourceLineNo">247</span><a name="line.247"></a>
<span class="sourceLineNo">248</span>    /**<a name="line.248"></a>
<span class="sourceLineNo">249</span>     * Get the root object graph for use in the transaction associated with the current thread.<a name="line.249"></a>
<span class="sourceLineNo">250</span>     *<a name="line.250"></a>
<span class="sourceLineNo">251</span>     * @return root object<a name="line.251"></a>
<span class="sourceLineNo">252</span>     * @throws IllegalStateException if there is no open transaction<a name="line.252"></a>
<span class="sourceLineNo">253</span>     */<a name="line.253"></a>
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<span class="sourceLineNo">256</span>        if (info == null)<a name="line.256"></a>
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<span class="sourceLineNo">258</span>        return info.getSnapshot().getRoot();<a name="line.258"></a>
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<span class="sourceLineNo">260</span><a name="line.260"></a>
<span class="sourceLineNo">261</span>    /**<a name="line.261"></a>
<span class="sourceLineNo">262</span>     * Change the root object graph to be committed in the transaction associated with the current thread.<a name="line.262"></a>
<span class="sourceLineNo">263</span>     * Subsequent calls to {@link #getRoot getRoot} will return the new object.<a name="line.263"></a>
<span class="sourceLineNo">264</span>     *<a name="line.264"></a>
<span class="sourceLineNo">265</span>     * &lt;p&gt;<a name="line.265"></a>
<span class="sourceLineNo">266</span>     * This method may be invoked during read-only transactions (as before, the root will not actually be committed).<a name="line.266"></a>
<span class="sourceLineNo">267</span>     * &lt;/p&gt;<a name="line.267"></a>
<span class="sourceLineNo">268</span>     *<a name="line.268"></a>
<span class="sourceLineNo">269</span>     * @param root new root object<a name="line.269"></a>
<span class="sourceLineNo">270</span>     * @throws IllegalStateException if there is no transaction associated with the current thread<a name="line.270"></a>
<span class="sourceLineNo">271</span>     * @throws IllegalArgumentException if {@code root} is null<a name="line.271"></a>
<span class="sourceLineNo">272</span>     */<a name="line.272"></a>
<span class="sourceLineNo">273</span>    public void setRoot(T root) {<a name="line.273"></a>
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<span class="sourceLineNo">277</span>        if (info == null)<a name="line.277"></a>
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<span class="sourceLineNo">279</span>        info.setSnapshot(this.persistentObject.new Snapshot(root, info.getSnapshot().getVersion()));<a name="line.279"></a>
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<span class="sourceLineNo">281</span><a name="line.281"></a>
<span class="sourceLineNo">282</span>    TxInfo&lt;T&gt; getCurrentTxInfo() {<a name="line.282"></a>
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<span class="sourceLineNo">285</span><a name="line.285"></a>
<span class="sourceLineNo">286</span>// ResourceTransactionManager<a name="line.286"></a>
<span class="sourceLineNo">287</span><a name="line.287"></a>
<span class="sourceLineNo">288</span>    @Override<a name="line.288"></a>
<span class="sourceLineNo">289</span>    public Object getResourceFactory() {<a name="line.289"></a>
<span class="sourceLineNo">290</span>        return this.persistentObject;<a name="line.290"></a>
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<span class="sourceLineNo">292</span><a name="line.292"></a>
<span class="sourceLineNo">293</span>// AbstractPlatformTransactionManager<a name="line.293"></a>
<span class="sourceLineNo">294</span><a name="line.294"></a>
<span class="sourceLineNo">295</span>    @Override<a name="line.295"></a>
<span class="sourceLineNo">296</span>    protected Object doGetTransaction() {<a name="line.296"></a>
<span class="sourceLineNo">297</span>        return new TxWrapper&lt;T&gt;(this.currentInfo.get());<a name="line.297"></a>
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<span class="sourceLineNo">299</span><a name="line.299"></a>
<span class="sourceLineNo">300</span>    @Override<a name="line.300"></a>
<span class="sourceLineNo">301</span>    protected boolean isExistingTransaction(Object txObj) {<a name="line.301"></a>
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<span class="sourceLineNo">303</span>    }<a name="line.303"></a>
<span class="sourceLineNo">304</span><a name="line.304"></a>
<span class="sourceLineNo">305</span>    @Override<a name="line.305"></a>
<span class="sourceLineNo">306</span>    @SuppressWarnings("unchecked")<a name="line.306"></a>
<span class="sourceLineNo">307</span>    protected void doBegin(Object txObj, TransactionDefinition txDef) {<a name="line.307"></a>
<span class="sourceLineNo">308</span><a name="line.308"></a>
<span class="sourceLineNo">309</span>        // Logging<a name="line.309"></a>
<span class="sourceLineNo">310</span>        if (this.logger.isTraceEnabled())<a name="line.310"></a>
<span class="sourceLineNo">311</span>            this.logger.trace("PersistentObjectTransactionManager.doBegin(): txObj=" + txObj + " txDef=" + txDef);<a name="line.311"></a>
<span class="sourceLineNo">312</span><a name="line.312"></a>
<span class="sourceLineNo">313</span>        // Sanity check<a name="line.313"></a>
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<span class="sourceLineNo">316</span>        if (this.isExistingTransaction(txObj))<a name="line.316"></a>
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<span class="sourceLineNo">319</span><a name="line.319"></a>
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<span class="sourceLineNo">323</span>            snapshot = txDef.isReadOnly() &amp;&amp; this.readOnlySharedRoot ?<a name="line.323"></a>
<span class="sourceLineNo">324</span>              this.persistentObject.getSharedRootSnapshot() : this.persistentObject.getRootSnapshot();<a name="line.324"></a>
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<span class="sourceLineNo">328</span><a name="line.328"></a>
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<span class="sourceLineNo">337</span><a name="line.337"></a>
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<span class="sourceLineNo">341</span><a name="line.341"></a>
<span class="sourceLineNo">342</span>        // Set transaction info into the Spring transaction object<a name="line.342"></a>
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<span class="sourceLineNo">345</span><a name="line.345"></a>
<span class="sourceLineNo">346</span>    /**<a name="line.346"></a>
<span class="sourceLineNo">347</span>     * Suspend the current transaction.<a name="line.347"></a>
<span class="sourceLineNo">348</span>     */<a name="line.348"></a>
<span class="sourceLineNo">349</span>    @Override<a name="line.349"></a>
<span class="sourceLineNo">350</span>    @SuppressWarnings("unchecked")<a name="line.350"></a>
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<span class="sourceLineNo">352</span><a name="line.352"></a>
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<span class="sourceLineNo">354</span>        if (this.logger.isTraceEnabled())<a name="line.354"></a>
<span class="sourceLineNo">355</span>            this.logger.trace("PersistentObjectTransactionManager.doSuspend(): txObj=" + txObj);<a name="line.355"></a>
<span class="sourceLineNo">356</span><a name="line.356"></a>
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<span class="sourceLineNo">360</span>        if (info == null)<a name="line.360"></a>
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<span class="sourceLineNo">362</span>        if (info != this.currentInfo.get())<a name="line.362"></a>
<span class="sourceLineNo">363</span>            throw new TransactionUsageException("the provided transaction object contains the wrong PersistentObject transaction");<a name="line.363"></a>
<span class="sourceLineNo">364</span><a name="line.364"></a>
<span class="sourceLineNo">365</span>        // Suspend it<a name="line.365"></a>
<span class="sourceLineNo">366</span>        if (this.logger.isTraceEnabled())<a name="line.366"></a>
<span class="sourceLineNo">367</span>            this.logger.trace("PersistentObjectTransactionManager.doSuspend(): suspending " + info.getSnapshot());<a name="line.367"></a>
<span class="sourceLineNo">368</span>        this.currentInfo.remove();<a name="line.368"></a>
<span class="sourceLineNo">369</span>        tx.setInfo(null);<a name="line.369"></a>
<span class="sourceLineNo">370</span>        PersistentObjectTransactionManager.getManagerMap(true).remove(this.beanName);<a name="line.370"></a>
<span class="sourceLineNo">371</span><a name="line.371"></a>
<span class="sourceLineNo">372</span>        // Done<a name="line.372"></a>
<span class="sourceLineNo">373</span>        return info;<a name="line.373"></a>
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<span class="sourceLineNo">375</span><a name="line.375"></a>
<span class="sourceLineNo">376</span>    /**<a name="line.376"></a>
<span class="sourceLineNo">377</span>     * Resume a previously suspended transaction.<a name="line.377"></a>
<span class="sourceLineNo">378</span>     */<a name="line.378"></a>
<span class="sourceLineNo">379</span>    @Override<a name="line.379"></a>
<span class="sourceLineNo">380</span>    @SuppressWarnings("unchecked")<a name="line.380"></a>
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<span class="sourceLineNo">382</span><a name="line.382"></a>
<span class="sourceLineNo">383</span>        // Logging<a name="line.383"></a>
<span class="sourceLineNo">384</span>        if (this.logger.isTraceEnabled())<a name="line.384"></a>
<span class="sourceLineNo">385</span>            this.logger.trace("PersistentObjectTransactionManager.doResume(): txObj=" + txObj + " res=" + suspendedResources);<a name="line.385"></a>
<span class="sourceLineNo">386</span><a name="line.386"></a>
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<span class="sourceLineNo">388</span>        if (this.currentInfo.get() != null)<a name="line.388"></a>
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<span class="sourceLineNo">392</span><a name="line.392"></a>
<span class="sourceLineNo">393</span>        // Get previously saved info<a name="line.393"></a>
<span class="sourceLineNo">394</span>        final TxWrapper&lt;T&gt; tx = (TxWrapper&lt;T&gt;)txObj;<a name="line.394"></a>
<span class="sourceLineNo">395</span>        final TxInfo&lt;T&gt; info = (TxInfo&lt;T&gt;)suspendedResources;<a name="line.395"></a>
<span class="sourceLineNo">396</span><a name="line.396"></a>
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<span class="sourceLineNo">398</span>        if (this.logger.isTraceEnabled())<a name="line.398"></a>
<span class="sourceLineNo">399</span>            this.logger.trace("PersistentObjectTransactionManager.doSuspend(): resuming " + info.getSnapshot());<a name="line.399"></a>
<span class="sourceLineNo">400</span>        final HashMap&lt;String, PersistentObjectTransactionManager&lt;?&gt;&gt; managerMap<a name="line.400"></a>
<span class="sourceLineNo">401</span>          = PersistentObjectTransactionManager.getManagerMap(true);<a name="line.401"></a>
<span class="sourceLineNo">402</span>        if (managerMap.containsKey(this.beanName)) {<a name="line.402"></a>
<span class="sourceLineNo">403</span>            throw new IllegalStateException("A PersistentObjectTransactionManager named `" + this.beanName<a name="line.403"></a>
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<span class="sourceLineNo">406</span>        managerMap.put(this.beanName, this);<a name="line.406"></a>
<span class="sourceLineNo">407</span>        this.currentInfo.set(info);<a name="line.407"></a>
<span class="sourceLineNo">408</span>        tx.setInfo(info);<a name="line.408"></a>
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<span class="sourceLineNo">410</span><a name="line.410"></a>
<span class="sourceLineNo">411</span>    @Override<a name="line.411"></a>
<span class="sourceLineNo">412</span>    @SuppressWarnings("unchecked")<a name="line.412"></a>
<span class="sourceLineNo">413</span>    protected void prepareForCommit(DefaultTransactionStatus status) {<a name="line.413"></a>
<span class="sourceLineNo">414</span>        final TxInfo&lt;T&gt; info = ((TxWrapper&lt;T&gt;)status.getTransaction()).getInfo();<a name="line.414"></a>
<span class="sourceLineNo">415</span>        if (this.logger.isTraceEnabled())<a name="line.415"></a>
<span class="sourceLineNo">416</span>            this.logger.trace("PersistentObjectTransactionManager.prepareForCommit(): status=" + status + " info=" + info);<a name="line.416"></a>
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<span class="sourceLineNo">420</span><a name="line.420"></a>
<span class="sourceLineNo">421</span>    @Override<a name="line.421"></a>
<span class="sourceLineNo">422</span>    @SuppressWarnings("unchecked")<a name="line.422"></a>
<span class="sourceLineNo">423</span>    protected void doCommit(DefaultTransactionStatus status) {<a name="line.423"></a>
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<span class="sourceLineNo">426</span>        if (this.logger.isTraceEnabled())<a name="line.426"></a>
<span class="sourceLineNo">427</span>            this.logger.trace("PersistentObjectTransactionManager.doCommit(): status=" + status);<a name="line.427"></a>
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<span class="sourceLineNo">431</span>        final TxInfo&lt;T&gt; info = tx.getInfo();<a name="line.431"></a>
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<span class="sourceLineNo">433</span>            throw new NoTransactionException("no current transaction exists");<a name="line.433"></a>
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<span class="sourceLineNo">438</span>            if (!info.isReadOnly()) {<a name="line.438"></a>
<span class="sourceLineNo">439</span>                if (this.logger.isTraceEnabled())<a name="line.439"></a>
<span class="sourceLineNo">440</span>                    this.logger.trace("PersistentObjectTransactionManager.doCommit(): committing " + info);<a name="line.440"></a>
<span class="sourceLineNo">441</span>                this.persistentObject.setRoot(snapshot.getRoot(), snapshot.getVersion());<a name="line.441"></a>
<span class="sourceLineNo">442</span>            } else<a name="line.442"></a>
<span class="sourceLineNo">443</span>                this.logger.trace("PersistentObjectTransactionManager.doCommit(): not committing read-only " + info);<a name="line.443"></a>
<span class="sourceLineNo">444</span>        } catch (PersistentObjectVersionException e) {<a name="line.444"></a>
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<span class="sourceLineNo">446</span>        } catch (PersistentObjectValidationException e) {<a name="line.446"></a>
<span class="sourceLineNo">447</span>            throw new DataIntegrityViolationException(null, e);<a name="line.447"></a>
<span class="sourceLineNo">448</span>        } catch (PersistentObjectException e) {<a name="line.448"></a>
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<span class="sourceLineNo">452</span><a name="line.452"></a>
<span class="sourceLineNo">453</span>    @Override<a name="line.453"></a>
<span class="sourceLineNo">454</span>    @SuppressWarnings("unchecked")<a name="line.454"></a>
<span class="sourceLineNo">455</span>    protected void doRollback(DefaultTransactionStatus status) {<a name="line.455"></a>
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<span class="sourceLineNo">458</span>        if (this.logger.isTraceEnabled())<a name="line.458"></a>
<span class="sourceLineNo">459</span>            this.logger.trace("PersistentObjectTransactionManager.doRollback(): status=" + status);<a name="line.459"></a>
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<span class="sourceLineNo">467</span><a name="line.467"></a>
<span class="sourceLineNo">468</span>        // Rollback<a name="line.468"></a>
<span class="sourceLineNo">469</span>        if (this.logger.isTraceEnabled())<a name="line.469"></a>
<span class="sourceLineNo">470</span>            this.logger.trace("PersistentObjectTransactionManager.doRollback(): rolling back " + info);<a name="line.470"></a>
<span class="sourceLineNo">471</span>        // no action required to rollback a PersistentObject transaction<a name="line.471"></a>
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<span class="sourceLineNo">473</span><a name="line.473"></a>
<span class="sourceLineNo">474</span>    @Override<a name="line.474"></a>
<span class="sourceLineNo">475</span>    @SuppressWarnings("unchecked")<a name="line.475"></a>
<span class="sourceLineNo">476</span>    protected void doSetRollbackOnly(DefaultTransactionStatus status) {<a name="line.476"></a>
<span class="sourceLineNo">477</span><a name="line.477"></a>
<span class="sourceLineNo">478</span>        // Logging<a name="line.478"></a>
<span class="sourceLineNo">479</span>        if (this.logger.isTraceEnabled())<a name="line.479"></a>
<span class="sourceLineNo">480</span>            this.logger.trace("PersistentObjectTransactionManager.doSetRollbackOnly(): status=" + status);<a name="line.480"></a>
<span class="sourceLineNo">481</span><a name="line.481"></a>
<span class="sourceLineNo">482</span>        // Get transaction<a name="line.482"></a>
<span class="sourceLineNo">483</span>        final TxWrapper&lt;T&gt; tx = (TxWrapper&lt;T&gt;)status.getTransaction();<a name="line.483"></a>
<span class="sourceLineNo">484</span>        final TxInfo&lt;T&gt; info = tx.getInfo();<a name="line.484"></a>
<span class="sourceLineNo">485</span>        if (info == null)<a name="line.485"></a>
<span class="sourceLineNo">486</span>            throw new NoTransactionException("no current transaction exists");<a name="line.486"></a>
<span class="sourceLineNo">487</span><a name="line.487"></a>
<span class="sourceLineNo">488</span>        // Set rollback only<a name="line.488"></a>
<span class="sourceLineNo">489</span>        if (this.logger.isTraceEnabled())<a name="line.489"></a>
<span class="sourceLineNo">490</span>            this.logger.trace("PersistentObjectTransactionManager.doSetRollbackOnly(): setting rollback-only: " + info);<a name="line.490"></a>
<span class="sourceLineNo">491</span>        info.setRollbackOnly(true);<a name="line.491"></a>
<span class="sourceLineNo">492</span>    }<a name="line.492"></a>
<span class="sourceLineNo">493</span><a name="line.493"></a>
<span class="sourceLineNo">494</span>    @Override<a name="line.494"></a>
<span class="sourceLineNo">495</span>    @SuppressWarnings("unchecked")<a name="line.495"></a>
<span class="sourceLineNo">496</span>    protected void doCleanupAfterCompletion(Object txObj) {<a name="line.496"></a>
<span class="sourceLineNo">497</span><a name="line.497"></a>
<span class="sourceLineNo">498</span>        // Logging<a name="line.498"></a>
<span class="sourceLineNo">499</span>        if (this.logger.isTraceEnabled())<a name="line.499"></a>
<span class="sourceLineNo">500</span>            this.logger.trace("PersistentObjectTransactionManager.doCleanupAfterCompletion(): txObj=" + txObj);<a name="line.500"></a>
<span class="sourceLineNo">501</span><a name="line.501"></a>
<span class="sourceLineNo">502</span>        // Get transaction<a name="line.502"></a>
<span class="sourceLineNo">503</span>        final TxWrapper&lt;T&gt; tx = (TxWrapper&lt;T&gt;)txObj;<a name="line.503"></a>
<span class="sourceLineNo">504</span><a name="line.504"></a>
<span class="sourceLineNo">505</span>        // Clean up<a name="line.505"></a>
<span class="sourceLineNo">506</span>        tx.setInfo(null);<a name="line.506"></a>
<span class="sourceLineNo">507</span>        this.currentInfo.remove();<a name="line.507"></a>
<span class="sourceLineNo">508</span>        final HashMap&lt;String, PersistentObjectTransactionManager&lt;?&gt;&gt; managerMap<a name="line.508"></a>
<span class="sourceLineNo">509</span>          = PersistentObjectTransactionManager.getManagerMap(false);<a name="line.509"></a>
<span class="sourceLineNo">510</span>        if (managerMap != null) {<a name="line.510"></a>
<span class="sourceLineNo">511</span>            managerMap.remove(this.beanName);<a name="line.511"></a>
<span class="sourceLineNo">512</span>            if (managerMap.isEmpty())<a name="line.512"></a>
<span class="sourceLineNo">513</span>                MANAGER_MAP.remove();<a name="line.513"></a>
<span class="sourceLineNo">514</span>        }<a name="line.514"></a>
<span class="sourceLineNo">515</span>    }<a name="line.515"></a>
<span class="sourceLineNo">516</span>}<a name="line.516"></a>
<span class="sourceLineNo">517</span><a name="line.517"></a>




























































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